Transcript No Slide Title

Chapter 2
Standardized Test Preparation
Preview
• Multiple Choice
• Short Answer
• Extended Response
Chapter 2
Standardized Test Preparation
Multiple Choice
1. Which of the following masses is the largest?
A. 0.200 g
B. 0.020 kg
C. 20.0 mg
D. 2000 µg
Chapter 2
Standardized Test Preparation
Multiple Choice
1. Which of the following masses is the largest?
A. 0.200 g
B. 0.020 kg
C. 20.0 mg
D. 2000 µg
Chapter 2
Standardized Test Preparation
Multiple Choice
2. Which of the following measurements contains three
significant figures?
A. 200 mL
B. 0.02 mL
C. 20.2 mL
D. 200.0 mL
Chapter 2
Standardized Test Preparation
Multiple Choice
2. Which of the following measurements contains three
significant figures?
A. 200 mL
B. 0.02 mL
C. 20.2 mL
D. 200.0 mL
Chapter 2
Standardized Test Preparation
Multiple Choice
3. A theory differs from a hypothesis in that a theory
A. cannot be disproved.
B. always leads to the formation of a law.
C. has been subjected to experimental testing.
D. represents an educated guess.
Chapter 2
Standardized Test Preparation
Multiple Choice
3. A theory differs from a hypothesis in that a theory
A. cannot be disproved.
B. always leads to the formation of a law.
C. has been subjected to experimental testing.
D. represents an educated guess.
Chapter 2
Standardized Test Preparation
Multiple Choice
4. All measurements in science
A. must be expressed in scientific notation.
B. have some degree of uncertainty.
C. are both accurate and precise.
D. must include only those digits that are known with
certainty.
Chapter 2
Standardized Test Preparation
Multiple Choice
4. All measurements in science
A. must be expressed in scientific notation.
B. have some degree of uncertainty.
C. are both accurate and precise.
D. must include only those digits that are known with
certainty.
Chapter 2
Standardized Test Preparation
Multiple Choice
5. When numbers are multiplied or divided, the answer
can have no more
A. significant figures than are in the measurement that
has the smallest number of significant figures.
B. significant figures than are in the measurement that
has the largest number of significant figures.
C. digits to the right of the decimal point than are in
the measurement that has the smallest number of
digits to the right of the decimal point.
D. digits to the right of the decimal point than are in
the measurement that has the largest number of
digits to the right of the decimal point.
Chapter 2
Standardized Test Preparation
Multiple Choice
5. When numbers are multiplied or divided, the answer
can have no more
A. significant figures than are in the measurement that
has the smallest number of significant figures.
B. significant figures than are in the measurement that
has the largest number of significant figures.
C. digits to the right of the decimal point than are in
the measurement that has the smallest number of
digits to the right of the decimal point.
D. digits to the right of the decimal point than are in
the measurement that has the largest number of
digits to the right of the decimal point.
Chapter 2
Standardized Test Preparation
Multiple Choice
6. Which of the following is not part of the scientific
method?
A. making measurements
B. introducing bias
C. making an educated guess
D. analyzing data
Chapter 2
Standardized Test Preparation
Multiple Choice
6. Which of the following is not part of the scientific
method?
A. making measurements
B. introducing bias
C. making an educated guess
D. analyzing data
Chapter 2
Standardized Test Preparation
Multiple Choice
7. The accuracy of a measurement
A. is how close it is to the true value.
B. does not depend on the instrument used to
measure the object.
C. indicates that the measurement is also precise.
D. is something that scientists rarely achieve.
Chapter 2
Standardized Test Preparation
Multiple Choice
7. The accuracy of a measurement
A. is how close it is to the true value.
B. does not depend on the instrument used to
measure the object.
C. indicates that the measurement is also precise.
D. is something that scientists rarely achieve.
Chapter 2
Standardized Test Preparation
Multiple Choice
8. A measurement of 23 465 mg converted to grams
equals
A. 2.3465 g.
B. 23.465 g.
C. 234.65 g.
D. 0.23465 g.
Chapter 2
Standardized Test Preparation
Multiple Choice
8. A measurement of 23 465 mg converted to grams
equals
A. 2.3465 g.
B. 23.465 g.
C. 234.65 g.
D. 0.23465 g.
Chapter 2
Standardized Test Preparation
Multiple Choice
9. A metal sample has a mass of 45.65 g. The volume of
the sample is 16.9 cm3.The density of the sample is
A. 2.7 g/cm3.
B. 2.70 g/cm3.
C. 0.370 g/cm3.
D. 0.37 g/cm3.
Chapter 2
Standardized Test Preparation
Multiple Choice
9. A metal sample has a mass of 45.65 g. The volume of
the sample is 16.9 cm3.The density of the sample is
A. 2.7 g/cm3.
B. 2.70 g/cm3.
C. 0.370 g/cm3.
D. 0.37 g/cm3.
Chapter 2
Standardized Test Preparation
Short Answer
10. A recipe for 18 cookies calls for 1 cup of chocolate
chips. How many cups of chocolate chips are needed
for 3 dozen cookies? What kind of proportion, direct or
indirect, did you use to answer this question?
Chapter 2
Standardized Test Preparation
Short Answer
10. A recipe for 18 cookies calls for 1 cup of chocolate
chips. How many cups of chocolate chips are needed
for 3 dozen cookies? What kind of proportion, direct or
indirect, did you use to answer this question?
Answer: 2 cups; direct proportion
Chapter 2
Standardized Test Preparation
Short Answer
11. Which of the following statements contain exact
numbers?
A. There are 12 eggs in a dozen.
B. The accident injured 21 people.
C. The circumference of the Earth at the equator is
40 000 km.
Chapter 2
Standardized Test Preparation
Short Answer
11. Which of the following statements contain exact
numbers?
A. There are 12 eggs in a dozen.
B. The accident injured 21 people.
C. The circumference of the Earth at the equator is
40 000 km.
Answer: Statements A and B contain exact numbers.
Chapter 2
Standardized Test Preparation
Extended Response
12. You have decided to test the effects of five garden fertilizers by
applying some of each to separate rows of radishes. What is the
variable you are testing? What factors should you control? How
will you measure and analyze the results?
Chapter 2
Standardized Test Preparation
Extended Response
12. You have decided to test the effects of five garden fertilizers by
applying some of each to separate rows of radishes. What is the
variable you are testing? What factors should you control? How
will you measure and analyze the results?
Answer: The type of fertilizer is the variable being tested. Control
factors are the types of radishes, the amount of water and the
amount of sunshine. One control row should be planted under the
same control factors but with no fertilizer. There are at least four
things that could be used to determine the results: size, quantity,
appearance, and taste. Analysis might include bar graphs of each
of these measurements for each of the five fertilizer types and the
no-fertilizer control row.
Chapter 2
Standardized Test Preparation
Extended Response
13. Around 1150, King David I of Scotland defined the
inch as the width of a man’s thumb at the base of the
nail. Discuss the practical limitations of this early unit
of measurement.
Chapter 2
Standardized Test Preparation
Extended Response
13. Around 1150, King David I of Scotland defined the
inch as the width of a man’s thumb at the base of the
nail. Discuss the practical limitations of this early unit
of measurement.
Answer: A unit must be defined in a way that does not
depend on the circumstances of the measurement.
Not every thumbnail is the same size.